Finding syntheses and systematic reviews:Cochrane Library - over 6,000 reviews on the effectiveness of healthcare interventionsCampbell Library - education, crime and justice and social welfareTrip Database - searches multiple websites for reviewsPEDro Database - physiotherapy evidence based studiesNICE Evidence search - searches for evidence from a wide range of health and social care servicesPROSPERO - an international database of prospectively registered systematic reviews in health and social care